Signed stones

Walk close to the stonework of a medieval cathedral and you can find small carved symbols cut into individual blocks, a fish, a crossed pair of lines, a personal glyph. These are masons’ marks, and they served two functions at once. They were payment: itinerant masons were often paid by the stone, and the mark said who had cut what. And they were accountability: if a block failed, the lodge knew whose work had failed. Seven centuries before anyone said the word provenance, the builders of the largest collective artifacts on earth had concluded that a shared structure requires every piece to carry its maker’s name.

Now stand the modern comparison next to it. A large model is, among other things, the largest assembly of human intellectual work ever constructed, and nearly every stone in it is unsigned. The training corpus is laundered into weights; the answer emerges with no marks on its blocks. Whatever else that is, it is not a cathedral. It is a building made of stones ground into aggregate, strong in places, but with no way to know whose work is bearing the load, no way to pay them, and no way to trace a failure to its source. Both of the mark’s original functions are gone at once, which is the tell that they were never really two functions. Payment and accountability are the same property, ownership of a contribution, read from two directions.

The standing objection is that signing does not scale, and there is a thirty-year counterexample. The Linux kernel accepts no contribution without a signed attribution trail; every patch carries its chain of names, across tens of thousands of contributors and three decades, and the practice did not slow the largest collaborative engineering project in history. It enabled it, because the trail is what lets strangers trust each other’s stones. Attribution is not the tax on collective work. It is the load-bearing joint.

So the requirement is admission control, stated the way a lodge would state it. Accept no stone without a signature. For anyone assembling human knowledge into machines, that means metadata travels with every contribution from ingestion onward, and anything that cannot say where it came from does not get laid into the wall. The rest of the cathedral argument, dissent and governance, comes after this one, because a structure that cannot name its makers has nothing yet to govern. Sign the stones, and everything else becomes possible: credit payable, failure traceable, and an aggregate of strangers’ work turned into a wall that strangers can trust with their weight.